The application is configured to use HTTPS. We want to be able to make calls from the client to a printer on their local network that exposes a simple api that uses HTTP. So from our javascript code we do a POST with a "text/plain" payload to send commands to the printer. When we send this request we get the following error.
jquery-3.3.1.min.js:2 Mixed Content: The page at 'https://...' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://.../pstprnt'. This request has been blocked; the content must be served over HTTPS.
Is there a way to configure CORS in such a way that only this traffic from and to a printer can be done using HTTP while the rest of the application uses HTTPS, without specifying the target IN startup.cs ? ( this is because the printers should be able to be expanded at runtime, so basically just 'allow all orgins', so that its not restricted to the ones specified in Startup.cs)
I have tried multiple guides online, but I'm guessing there is something wrong with our Startup.cs file structure.
The request to the printer looks like this:
$.ajax({
type: "POST",
url: "http://<printer-ip>/pstprnt",
data: 'some ZPL',
contentType: 'text/plain'
}).done((res) => {
console.log("second success");
}).fail((e) => {
alert(e);
})
Here is a snippet our Startup file.
CONFIGURE SERVICES
public void ConfigureServices(IServiceCollection services)
{
// Add Cors
services.AddCors();
services.Configure<CookiePolicyOptions>(options =>
{
// This lambda determines whether user consent for non-essential cookies is needed for a given request.
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
/* (Verification/password reset) email sender */
//services.AddTransient<IEmailSender, EmailSender>();
//services.Configure<AuthMessageSenderOptions>(Configuration);
Task.Run(() => {
var options = new DbContextOptionsBuilder<ApplicationDbContext>().UseSqlServer(Configuration.GetConnectionString("DefaultConnection")).Options;
using (var dbContext = new ApplicationDbContext(options)) {
var model = dbContext.AankoopProduct;
}
});
services.AddLocalization();
/*
I commented this out because I am using UseEndpoints, Am I doing this correctly?
services.AddMvc()
.AddViewLocalization(LanguageViewLocationExpanderFormat.Suffix)
.AddDataAnnotationsLocalization().AddNewtonsoftJson(options =>
options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore);
*/
services.AddIdentity<Gebruiker, IdentityRole>(options =>
{
options.Lockout.MaxFailedAccessAttempts = 5;
options.Lockout.DefaultLockoutTimeSpan = TimeSpan.FromMinutes(15);
options.SignIn.RequireConfirmedEmail = true;
}).AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
services.Configure<IdentityOptions>(options =>
{
// Password settings.
options.Password.RequireDigit = true;
options.Password.RequireLowercase = true;
options.Password.RequireNonAlphanumeric = false;
options.Password.RequireUppercase = true;
options.Password.RequiredLength = 6;
options.Password.RequiredUniqueChars = 1;
});
services.AddControllersWithViews().AddNewtonsoftJson(options =>
options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore);
// .cshtml views & .razor components
services.AddRazorPages();
//SignalR for Websockets
services.AddSignalR();
// reload views after changing JS
#if DEBUG
var mvcBuilder = services.AddControllersWithViews();
mvcBuilder.AddRazorRuntimeCompilation();
#endif
services.ConfigureApplicationCookie(opts => opts.LoginPath = "/Account/Login");
/* Breadcrumbs */
services.AddBreadcrumbs(GetType().Assembly, options =>
{
options.TagName = "nav";
options.TagClasses = "";
options.OlClasses = "breadcrumb breadcrumb--transparent m-0";
options.LiClasses = "breadcrumb-item";
options.ActiveLiClasses = "breadcrumb-item active";
//options.SeparatorElement = "<li class=\"separator\">/</li>";
});
/* Repositories */
services.RegisterRepositories();
services.AddSession();
}
CONFIGURE
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IVerkoopProductXMLRepository rep)
{
//app.ApplicationServices.GetService<IInkomendeBestellingTrackerSingleton>();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseHsts();
}
#region Auth
var supportedCultures = new[]
{
new CultureInfo("nl-BE")
};
app.UseRequestLocalization(new RequestLocalizationOptions
{
DefaultRequestCulture = new RequestCulture("nl-BE"),
// Formatting numbers, dates, etc.
SupportedCultures = supportedCultures,
// UI strings that we have localized.
SupportedUICultures = supportedCultures
});
var cultureInfo = new CultureInfo("nl-BE");
cultureInfo.NumberFormat.CurrencySymbol = "€";
cultureInfo.NumberFormat.NumberDecimalSeparator = ".";
CultureInfo.DefaultThreadCurrentCulture = cultureInfo;
CultureInfo.DefaultThreadCurrentUICulture = cultureInfo;
Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo("nl-BE");
Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("nl-BE");
// To configure external authentication,
// see: http://go.microsoft.com/fwlink/?LinkID=532715
#endregion
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseStatusCodePages();
app.UseRouting();
app.UseSession();
// Enable Cors
app.UseCors();
/*
I commented this out because I am using UseEndpoints() , Am I doing this correctly?
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=UserSelection}/{id?}");
});
*/
app.UseCookiePolicy();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints => {
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Account}/{action=Login}/{id?}");
});
}
